you might want to open up the bleeders and just let them gravity bleed for a while. if this won't work, did you replace the flex hoses when you replaced the calipers? it is known that flex hoses can deteriorate internally and plug up. try disconnecting the lines from the calipers and see if any fluid is flowing from them at all. if so, you may have defective calipers...or, did you perhaps have rubber plugs in the line holes, and not get it all out?
John

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!